Legally you will have to run 2 converters assuming you are running true dual exhaust all the way back. (Hopefully you are.) On the performance and cost effective side, most people don't put the converters back on at all. If you're having a shop do it they have to put them back on or they get a huge fine if they get caught. Your choice , but there's all the info i can provide.
Open headers are essentially an open exhaust system with no mufflers or catalog converters
no, a catalytic converter removes harmful gases produced by an engine, headers simply provide increased airflow out of the exhaust
They are in the exhaust system/pipe. Just start at the engine and follow the exhaust back to the muffler and you will see them. They are about 3 inches long with a electric wire hooked to them. They just screew out. I believe ther is 3 of them but there might be 4. just look at the exhaust pipe real good. On the 8.1 engine, two are located ahead of the catalytic converters in the exhaust headers and two in the tail pipes after the catalytic converters.
There are 2 or 3 oxygen sensors in your exhaust. "Upstream" sensors are located between the exhaust manifolds (headers) and the catalytic converter (usually located on the mid-pipe); "downstream" sensors are located after the catalytic converters. On V6 Mustangs there can either be one or two upstream sensors and usually only one downstream sensor.
If you have the SS, then there should be 4. There will be one on each pipe coming from the headers. There will be two more on the pipes after the catalytic converters. If you have the non SS version then there are only 2. There will be one in the pipe after the cross over pipe that brings exhaust flow from the driver's side header to the passenger side. The second one will be after the catalytic converter.
As far as I know it has 1 cat after the headers and there is also a resonator.
if your car has duel exhaust, they should be located a foot or two away from the headers, since the exhaust heat makes them work. They have to be cut off by a mechanic, and new ones welded back on as well. They should be closer to the engine then the muffler, around the transmission in an impala. hope this helps
The answer would be "No, you don't have to". If you installed exhaust headers to improve performance then you might consider if your current exhaust system compliments the headers. Headers are designed to help evacuate exhaust gases and minimize back pressure. If an engine has exhaust headers that collect into a small single muffler and pipe then the effort is somewhat defeated. BUT, if the headers are installed for the "cool factor", and there is nothing wrong with that, then go ahead and use the stock pipes or as much as you can.
Headers (also known as exhaust manifolds) are the part that takes the spent exhaust gases from each individual cylinder of the engine, bring them together, and expel them from the vehicle (usually passing through one or more catalytic converters and one or more mufflers on the way). V-layout engines (V6, V8, etc) have two headers, whereas inline engines have just one. Usually, the term "headers" is only used for performance-enhancing aftermarket replacements for the factory exhaust manifolds. If a car needs new headers, that generally means that the existing manifolds have been damaged in some way. One common cause of this is rust.
Yes, you can put headers on and use your existing carburator. You may, however, want or need to tune it, depending on how it runs after the headers are installed.
it totally depends on everything,2 barrell,or 4 barrell carburetor,headers,or stock manifold,what type of exhaust system,if you have power robbing gas guzzling catalytic converters on the truck or not. most likely a stock Chevy with a 305 v8 will probably be pushing about 150-210 horsepower.
Below the firewall on both sides of the car, where the pipes go down from the headers.